Tunnel stress analyses in 3-D using equivalent continuum and discontinuum procedures

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Deformation and stability around a tunnel in a limestone rock mass is investigated using both (a) an equivalent continuum/discontinuum model and (b) a fully discontinuum model through three-dimensional stress analyses. In model (a), the Representative Elementary Volume (REV) mechanical properties estimated in a previous paper are used to represent the combined behavior of intact rock and 4 of the 5 fracture sets that had significantly smaller sizes compared to the fifth fracture set (bedding planes). To this system, the bedding plane fractures were added according to its statistical geometric properties. In model (b), all 5 fracture sets were generated according to the obtained fracture geometry statistical models. Using model (a), effect of several factors, such as REV property values, bedding plane modeling method, the average horizontal stress to the vertical stress and tunnel depth, on the geotechnical behavior around the tunnel was studied in detail. A comparison is made between the stress analyses results obtained through the aforementioned two models.

Original languageEnglish (US)
Title of host publication47th US Rock Mechanics / Geomechanics Symposium 2013
Pages2774-2781
Number of pages8
StatePublished - Dec 1 2013
Event47th US Rock Mechanics / Geomechanics Symposium 2013 - San Francisco, CA, United States
Duration: Jun 23 2013Jun 26 2013

Publication series

Name47th US Rock Mechanics / Geomechanics Symposium 2013
Volume4

Other

Other47th US Rock Mechanics / Geomechanics Symposium 2013
CountryUnited States
CitySan Francisco, CA
Period6/23/136/26/13

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Kulatilake, P. H. S. W., & Wu, Q. (2013). Tunnel stress analyses in 3-D using equivalent continuum and discontinuum procedures. In 47th US Rock Mechanics / Geomechanics Symposium 2013 (pp. 2774-2781). (47th US Rock Mechanics / Geomechanics Symposium 2013; Vol. 4).